Influence of Nickel Sulfate Additives to Electrolytes Subjected to Microarc Oxidation on the Structure, Composition, and Properties of Coatings Formed on Titanium

被引:12
作者
Bogdashkina N.L. [1 ]
Gerasimov M.V. [1 ]
Zalavutdinov R.K. [1 ]
Kasatkina I.V. [1 ]
Krit B.L. [2 ]
Lyudin V.B. [2 ]
Fedichkin I.D. [2 ]
Shcherbakov A.I. [1 ]
Apelfeld A.V. [2 ]
机构
[1] Frumkin Institute of Physical Cheistry and Electrochemistry, Russian Academy of Science, Moscow
[2] Moscow Aviation Institute (National Research University) (MAI), Moscow
关键词
anodic dissolution currents; composition; electrical strength; MAO coatings; microarc oxidation; nickel sulfate; poorly soluble titanium anodes; structure; thickness; titanium;
D O I
10.3103/S106837551804004X
中图分类号
学科分类号
摘要
The influence of nickel sulfate additives to acid and basic electrolytes for microarc oxidation on the structure, composition, and properties of coatings formed on VT1-0 titanium were studied to produce poorly soluble titanium anodes. We established the possibility of incorporating nickel (nickel oxide) into the composition of coatings. X-ray diffraction analysis showed that the coatings contained nickel oxide β-NiO with a cubic lattice, TiO2 in the form of rutile, and SiO2 in the form of high-temperature β-cristobalite. The maximum thickness and nickel content in the surface layer and the minimum values of both the anodic dissolution currents and the electrical strength were obtained for the coatings formed in silicate-alkali (3 g/L KOH + 4.5 g/L Na2SiO3) electrolyte with the addition of 1 g/L of nickel sulfate NiSO4. © 2018, Allerton Press, Inc.
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页码:331 / 337
页数:6
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